16393231 has 2 divisors, whose sum is σ = 16393232. Its totient is φ = 16393230.

The previous prime is 16393229. The next prime is 16393297. The reversal of 16393231 is 13239361.

16393231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13239361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16393231 - 2¹ = 16393229 is a prime.

It is a super-2 number, since 2×16393231² = 537476045238722, which contains 22 as substring.

Together with 16393229, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16393231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16393031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8196615 + 8196616.

It is an arithmetic number, because the mean of its divisors is an integer number (8196616).

Almost surely, 2^16393231 is an apocalyptic number.

16393231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16393231 is an equidigital number, since it uses as much as digits as its factorization.

16393231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 28.

The square root of 16393231 is about 4048.8555173036. The cubic root of 16393231 is about 254.0318589009.

The spelling of 16393231 in words is "sixteen million, three hundred ninety-three thousand, two hundred thirty-one".